2016/02/29 by Junki Yoshitake, Joji Nasu, Yukitoshi Motome · 4 citations
Engineering · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Doublet state #Electron #Fermion #MAJORANA #Monte Carlo method #Perovskite Materials and Applications #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum Monte Carlo #Quantum mechanics #Quantum spin liquid #Spin (aerodynamics) #Spin engineering #Spin polarization #Spin quantum number #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.117.157203
published as Phys. Rev. Lett. 117, 157203 (2016) · accepted for publication in Phys. Rev. Lett
arxiv created 2016/08/31 · openalex publication_date 2016/10/07 · arxiv updated 2016/10/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Experimental identification of quantum spin liquids remains a challenge, as the pristine nature is to be seen in asymptotically low temperatures. We here theoretically show that the precursor of quantum spin liquids appears in the spin dynamics in the paramagnetic state over a wide temperature range. Using the cluster dynamical mean-field theory and the continuous-time quantum Monte Carlo method, which are newly developed in the Majorana fermion representation, we calculate the dynamical spin structure factor, relaxation rate in nuclear magnetic resonance, and magnetic susceptibility for the honeycomb Kitaev model whose ground state is a canonical example of the quantum spin liquid. We find that dynamical spin correlations show peculiar temperature and frequency dependence even below the temperature where static correlations saturate. The results provide the experimentally accessible symptoms of the fluctuating fractionalized spins evincing the quantum spin liquids.